Composite steel belt, oil scraper and oil removal vessel

Abstract

The present invention provides a composite steel belt, an oil scraper and an oil removal ship, and relates to the field of sewage treatment. The composite steel belt includes a steel belt body and an oil-absorbing felt; the steel belt body is arranged in a ring shape, the oil-absorbing felt is fixedly attached to the outer surface of the steel belt, and the oil-absorbing felt is used to absorb oil from the oil-water mixture. By using the composite steel belt provided by the present invention, the oil in the sewage can be efficiently absorbed by the oil-absorbing felt during operation, and water will not be absorbed, thereby improving the work efficiency of treating the oil in the sewage. The oil scraper includes an oil scraper body and a composite steel belt, and the oil scraper body is provided with a first roller, the side of the first roller is attached to the oil-absorbing felt, and the first roller is used to apply pressure to the oil-absorbing felt. By using the oil scraper provided by the present invention, the oil in the sewage can be efficiently absorbed by the oil-absorbing felt in the composite steel belt during operation, and water will not be absorbed, thereby improving the work efficiency of treating the oil in the sewage.

Description

Technical Field

[0001] The invention relates to the field of sewage treatment, and in particular to a composite steel belt, an oil scraper and an oil removal ship. Background Art

[0002] The treatment of oil in sewage is the key point in sewage treatment. In the prior art, the treatment method for oil in sewage is to use a motor to drive a steel belt transmission, and place one end of the steel belt in an oil-containing pool. During the steel belt transmission process, the viscosity of oil is greater than that of water or other liquids, so that the oil can be transmitted to the upper end along with the steel belt transmission. When the upper end steel belt is transmitted downward, the oil will be shoveled into the collection device by two wedge blocks.

[0003] However, when wastewater contains acid or alkaline substances, the viscosity of some will be reduced, which will greatly reduce the efficiency of steel belt transmission oil recovery and make it difficult to meet actual needs. In addition, the steel belt has low adsorption capacity for oil and low oil absorption efficiency, often less than 2-3m 2 , it takes about two hours to achieve an oil removal efficiency of 95%. Summary of the invention

[0004] Another object of the present invention is to provide a composite steel belt capable of performing high-efficiency oil absorption work.

[0005] Another object of the present invention is to provide an oil scraper that can efficiently remove oil from sewage;

[0006] Another object of the present invention is to provide an oil removal vessel capable of efficiently removing oil from sewage.

[0007] The embodiment of the present invention is achieved as follows:

[0008] A composite steel belt comprises a steel belt body and oil-absorbing felt;

[0009] The steel belt body is arranged in a ring shape, and the oil-absorbing felt is fixedly attached to the outer surface of the steel belt, and the oil-absorbing felt is used for absorbing oil from the oil-water mixture.

[0010] In a preferred embodiment of the present invention, the oil-absorbing felt is fixedly connected to the steel belt body by glue.

[0011] In a preferred embodiment of the present invention, the oil-absorbing felt is fixedly connected to the steel belt body by rivets, and the rivets are arranged at the edge of the steel belt body.

[0012] In a preferred embodiment of the present invention, the surface of the composite steel belt used for connecting with the oil-absorbing felt is set as a frosted surface.

[0013] In a preferred embodiment of the present invention, the oil-absorbing felt is prepared by the following method:

[0014] Soak the polyurethane sponge in the roughening liquid for 20 to 40 seconds, wait for the polyurethane sponge to fully absorb the roughening liquid, then take it out and wash it with water for 3 to 8 minutes to complete the roughening step;

[0015] Soak the polyurethane sponge in the sensitizing solution for 8 to 12 minutes to complete the sensitization step;

[0016] Soak the polyurethane sponge in the activation solution for 3 to 7 minutes to complete the activation step;

[0017] Put the sponge that has completed the sensitization step and the activation step into the Fe3O4 suspension, and heat it at 90-100°C for 20-30 minutes by passing air;

[0018] After soaking in 8-12 mmol / L lauric acid for 8-12 minutes, soak in 4-6 mmol / L hexadecyltrimethoxysilane for 2.5-3.5 hours, and then dry at 70-90°C for 10-14 hours.

[0019] In a preferred embodiment of the present invention: the roughening liquid is prepared in the following manner:

[0020] Mix CrO3, H2SO4 and water in a mass ratio of 1-3:3-5:20-30 and stir evenly.

[0021] In a preferred embodiment of the present invention: the sensitizing solution is prepared in the following manner:

[0022] Add excess SnCl2 to concentrated hydrochloric acid and stir, then filter out the insoluble matter with gauze to leave the clear liquid.

[0023] In a preferred embodiment of the present invention: the activation solution is prepared in the following manner:

[0024] Mix silver nitrate and water in a weight ratio of 10 to 20:1000 and stir. Add ammonia water during stirring. When brown precipitate is generated in the solution, continue to add ammonia water until the solution becomes clear.

[0025] An oil scraper comprises an oil scraper body and the above-mentioned composite steel belt, wherein the oil scraper body is provided with a first roller, the side surface of the first roller is in contact with the oil absorbing felt, and the first roller is used to apply pressure to the oil absorbing felt.

[0026] In a preferred embodiment of the present invention, the oil scraper body is further provided with an oil scraping plate, one end of which is in contact with the oil absorbing felt to scrape off the oil absorbed on the oil absorbing felt.

[0027] In a preferred embodiment of the present invention, the oil scraper body further comprises a second roller, the first roller and the second roller are respectively arranged on both sides of the composite steel belt, and the composite steel belt is clamped between the first roller and the second roller.

[0028] An oil skimmer comprises a hull and the above-mentioned oil scraper, wherein the hull is provided with a containing space, the composite steel belt portion on the oil scraper is located in the containing space, the composite steel belt portion on the oil scraper extends out of the containing space, and the composite steel belt on the oil scraper extending out of the containing space is used to contact with water.

[0029] The beneficial effects of the embodiments of the present invention are:

[0030] By using the composite steel belt provided by the present invention, the oil in the sewage can be efficiently absorbed by the oil-absorbing felt during operation without absorbing water, thereby improving the working efficiency of treating the oil in the sewage.

[0031] The oil scraper provided by the present invention can efficiently absorb the oil in the sewage by using the oil absorption felt in the composite steel belt during operation without absorbing water, thereby improving the working efficiency of treating the oil in the sewage.

[0032] By utilizing the oil removal boat provided by the present invention, the oil scraper can be placed on the water surface using the boat hull during operation. Since the oil floats on the water surface, the oil absorption felt in the composite steel belt can be used to efficiently absorb the oil on the water surface without absorbing water, thereby improving the efficiency of treating the oil in the sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A schematic diagram of the structure of a composite steel strip provided in an embodiment of the present invention;

[0035] Figure 2 A schematic structural diagram of an oil scraper from a first perspective provided by an embodiment of the present invention;

[0036] Figure 3 A schematic structural diagram of an oil scraper from a second viewing angle provided by an embodiment of the present invention;

[0037] Figure 4 A schematic structural diagram of a de-oiling vessel from a first perspective provided by an embodiment of the present invention;

[0038] Figure 5 A schematic structural diagram from a second perspective of an oil skimmer provided by an embodiment of the present invention.

[0039] Icons: 100-composite steel belt; 110-oil-absorbing felt; 120-steel belt body; 130-rivet; 200-oil scraper; 210-first roller; 220-second roller; 230-oil shovel board; 300-oil skimmer; 310-hull; 311-floating part; 312-cabin. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the invented product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0044] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0045] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0046] First embodiment

[0047] This embodiment provides a method for treating oil-absorbing felt, and the specific steps are as follows:

[0048] Soak the polyurethane sponge in the roughening solution for 30 seconds, wait for the polyurethane sponge to fully absorb the roughening solution, then take it out and wash it with water for 5 minutes to complete the roughening step;

[0049] The polyurethane sponge was placed in the sensitizing solution and soaked for 10 minutes to complete the sensitization step;

[0050] Soak the polyurethane sponge in the activation solution for 5 minutes to complete the activation step;

[0051] The sponge that has completed the sensitization and activation steps is placed in a Fe3O4 suspension and heated at 95°C for 25 minutes with air;

[0052] After soaking in 10 mmol / L lauric acid for 10 min, it was soaked in 5 mmol / L hexadecyltrimethoxysilane for 3 h and then dried at 80 °C for 12 h.

[0053] Optionally, in this embodiment, the roughening liquid is prepared in the following manner:

[0054] Mix CrO3, H2SO4 and water in a mass ratio of 2:4:25 and stir evenly.

[0055] Optionally, in this embodiment, the sensitizing solution is prepared in the following manner:

[0056] Add excess SnCl2 to concentrated hydrochloric acid and stir, then filter out the insoluble matter with gauze to leave the clear liquid.

[0057] Optionally, in this embodiment, the activation solution is prepared in the following manner:

[0058] Mix silver nitrate and water in a weight ratio of 15:1000 and stir. Add ammonia water during stirring. When brown precipitate is formed in the solution, continue to add ammonia water until the solution becomes clear.

[0059] The experiment confirmed that the polyurethane sponge treated as above has super hydrophobicity and super oleophilicity, with a contact angle of 152° with water. The oil is absorbed by the sponge within 1.5 seconds, and the contact angle with the oil is 0°. When the angle is only 10°, the water on the polyurethane surface will automatically roll off. Thus, the oil in the sewage can be efficiently absorbed, but the water in the sewage will not be absorbed.

[0060] Second embodiment

[0061] This embodiment provides a method for treating oil-absorbing felt, and the specific steps are as follows:

[0062] The polyurethane sponge was placed in the roughening liquid and soaked for 20 seconds. After the polyurethane sponge fully absorbed the roughening liquid, it was taken out and washed with water for 3 minutes to complete the roughening step;

[0063] The polyurethane sponge was immersed in the sensitizing solution for 8 minutes to complete the sensitization step;

[0064] Soak the polyurethane sponge in the activation solution for 3 minutes to complete the activation step;

[0065] The sponge that has completed the sensitization and activation steps is placed in a Fe3O4 suspension and heated at 90°C for 20 minutes with air;

[0066] After soaking in 8 mmol / L lauric acid for 8 min, it was soaked in 4 mmol / L hexadecyltrimethoxysilane for 2.5 h and then dried at 70°C for 10 h.

[0067] Optionally, in this embodiment, the roughening liquid is prepared in the following manner:

[0068] Mix CrO3, H2SO4 and water in a mass ratio of 1:3:20 and stir evenly.

[0069] Optionally, in this embodiment, the sensitizing solution is prepared in the following manner:

[0070] Add excess SnCl2 to concentrated hydrochloric acid and stir, then filter out the insoluble matter with gauze to leave the clear liquid.

[0071] Optionally, in this embodiment, the activation solution is prepared in the following manner:

[0072] Mix silver nitrate and water in a weight ratio of 10:1000 and stir. Add ammonia water during stirring. When brown precipitate is formed in the solution, continue to add ammonia water until the solution becomes clear.

[0073] The experiment confirmed that the polyurethane sponge treated as above has super hydrophobicity and super oleophilicity, with a contact angle of 150° with water. The oil is absorbed by the sponge within 2.0s, and the contact angle with oil is 0°. When the angle is only 8°, the water on the polyurethane surface will automatically roll off. Thus, the oil in the sewage can be efficiently absorbed, but the water in the sewage will not be absorbed.

[0074] Third embodiment

[0075] This embodiment provides a method for treating oil-absorbing felt, and the specific steps are as follows:

[0076] The polyurethane sponge was placed in the roughening liquid and soaked for 40 seconds. After the polyurethane sponge fully absorbed the roughening liquid, it was taken out and washed with water for 8 minutes to complete the roughening step;

[0077] The polyurethane sponge was placed in the sensitizing solution and soaked for 12 minutes to complete the sensitization step;

[0078] Soak the polyurethane sponge in the activation solution for 7 minutes to complete the activation step;

[0079] The sponge that has completed the sensitization and activation steps is placed in a Fe3O4 suspension and heated at 100°C for 30 minutes with air;

[0080] After soaking in 12 mmol / L lauric acid for 12 min, it was soaked in 6 mmol / L hexadecyltrimethoxysilane for 3.5 h and then dried at 90°C for 14 h.

[0081] Optionally, in this embodiment, the roughening liquid is prepared in the following manner:

[0082] Mix CrO3, H2SO4 and water in a mass ratio of 3:5:30 and stir evenly.

[0083] Optionally, in this embodiment, the sensitizing solution is prepared in the following manner:

[0084] Add excess SnCl2 to concentrated hydrochloric acid and stir, then filter out the insoluble matter with gauze to leave the clear liquid.

[0085] Optionally, in this embodiment, the activation solution is prepared in the following manner:

[0086] Mix silver nitrate and water in a weight ratio of 20:1000 and stir. Add ammonia water during stirring. When brown precipitate is formed in the solution, continue to add ammonia water until the solution becomes clear.

[0087] The experiment confirmed that the polyurethane sponge treated as above has super hydrophobicity and super oleophilicity, with a contact angle of 151° with water. The oil is absorbed by the sponge within 1.8 seconds, and the contact angle with oil is 0°. When the angle is only 9°, the water on the polyurethane surface will automatically roll off. Thus, the oil in the sewage can be efficiently absorbed, but the water in the sewage will not be absorbed.

[0088] Fourth embodiment

[0089] This embodiment provides an oil-absorbing felt, which is prepared by the treatment method of the oil-absorbing felt provided in the above embodiment.

[0090] The oil-absorbing felt provided by the above-mentioned embodiment has super-hydrophobicity and super-oleophilicity. When used in sewage treatment, it has high oil absorption efficiency, which is beneficial to improving operation efficiency.

[0091] Fifth embodiment

[0092] This embodiment provides a composite steel strip 100, see Figure 1 , the composite steel belt 100 comprises a steel belt body 120 and an oil-absorbing felt 110;

[0093] The steel belt body 120 is arranged in a ring shape, and the oil-absorbing felt 110 is fixedly attached to the outer surface of the steel belt. The oil-absorbing felt 110 is used to absorb oil from the oil-water mixture.

[0094] Since the oil-absorbing felt 110 provided in the above embodiment has super-hydrophobicity and super-oleophilicity, it has high oil-absorbing efficiency when used in sewage treatment, which is beneficial to improving the operation efficiency;

[0095] The experiment proved that when installed on the steel belt conveyor, the oil absorption rate can reach 2㎡ / min for fixed water areas such as factories, and 2.5㎡ / min for fixed water areas with liquid surface agitation. The oil removal rate on the water surface can reach more than 99%. When installed on a small oil-absorbing boat, it can remove more than 85% of the oil on the water surface of a river with a water flow speed of less than 1m / s; and this oil removal belt can be used repeatedly, and the oil removal effect will not decrease.

[0096] It should be pointed out that the oil-absorbing felt 110 provided in this embodiment can be obtained by the treatment method of the oil-absorbing felt provided in the above embodiment, or by other methods, as long as it has the properties of oil absorption and hydrophobicity.

[0097] Optionally, in this embodiment, the oil-absorbing felt 110 is fixedly connected to the steel belt body 120 by glue.

[0098] The oil-absorbing felt 110 can be tightly attached to the steel belt body 120 by glue, so that the oil-absorbing felt 110 can maintain a fixed connection with the steel belt body 120. As for the choice of glue, it is only necessary to select glue that can be used in a water environment in the prior art.

[0099] Optionally, in the present embodiment, the oil-absorbing felt 110 is fixedly connected to the steel belt body 120 via rivets 130 , and the rivets 130 are arranged at the edge of the steel belt body 120 .

[0100] Since the oil-absorbing felt 110 and the steel belt body 120 are connected together by tape, the edge of the oil-absorbing felt 110 will be pulled under the action of external force, causing deformation between the side of the oil-absorbing felt 110 away from the steel belt body 120 and the side of the oil-absorbing felt 110 that is bonded to the steel belt body 120, thereby affecting the integrity of the oil-absorbing felt 110; therefore, the oil-absorbing felt 110 is fixedly connected to the steel belt body 120 at the edge of the steel belt body 120 by rivets 130, which can effectively prevent the problem of large deformation of the oil-absorbing felt 110 caused by pulling at the edge of the oil-absorbing felt 110.

[0101] Fifth embodiment

[0102] This embodiment provides an oil scraper 200, see Figure 2 and Figure 3 The oil scraper 200 comprises: an oil scraper 200 body and the composite steel belt 100 provided in the above embodiment. The oil scraper 200 body has a first roller 210 , the side of the first roller 210 is in contact with the oil-absorbing felt 110 , and the first roller 210 is used to apply pressure to the oil-absorbing felt 110 .

[0103] During operation, the composite steel belt 100 can absorb oil in sewage, and the first roller 210 can squeeze the oil-absorbing felt 110 on the composite steel belt 100 so that the oil absorbed on the oil-absorbing felt 110 is squeezed out, thereby facilitating collection.

[0104] It should be pointed out that the oil scraper 200 in the prior art already has a mature device for collecting oil that falls off the steel belt. Therefore, in this embodiment, the device for collecting oil that falls off the steel belt on the oil scraper 200 is not described in detail, but this is clear to those skilled in the art.

[0105] Optionally, in this embodiment, the oil scraper 200 body further has a second roller 220 , the first roller 210 and the second roller 220 are respectively disposed on both sides of the composite steel belt 100 , and the composite steel belt 100 is clamped between the first roller 210 and the second roller 220 .

[0106] By utilizing the squeezing of the first roller 210 and the second roller 220 , the effect of two wedge-shaped shovel blocks in the prior art can be achieved, and the oil on the oil scraper 200 body can be squeezed so that the oil can fall off the oil scraper 200 body.

[0107] Optionally, in the present embodiment, the oil scraper 200 body further comprises an oil scraping plate 230 , and one end of the oil scraping plate 230 is in contact with the oil absorbing felt 110 to scrape off the oil absorbed on the oil absorbing felt 110 .

[0108] It should be pointed out that, in the present embodiment, the oil scraping plate 230 is substantially the same as the oil scraping plate 230 in the prior art. The difference lies in that the oil scraping plate 230 and the oil absorbing felt 110 provided in the present embodiment are bonded together, and the oil scraping plate 230 squeezes the oil absorbing felt 110, thereby facilitating the removal of the oil adsorbed on the oil absorbing felt 110. The connection angle between the oil scraping plate 230 and the oil absorbing felt 110, as well as the installation method of the oil scraping plate 230, etc., can be kept the same as the oil scraping plate in the prior art.

[0109] It should be noted that, in the present embodiment, the first roller 210 and the second roller 220 are both driven by motors, and the use of motors to drive rollers is a mature application in the prior art. Although the structure of the motor and the connection method between the motor and the rollers are not described in detail in the present embodiment, it is clear to those skilled in the art that the first roller 210 and the second roller 220 are driven by motors.

[0110] Sixth embodiment

[0111] This embodiment provides an oil removal vessel 300, see Figure 4 and Figure 5 The de-oiling vessel 300 comprises a hull 310 and the oil scraper 200 provided in the above embodiment. The hull 310 has a containing space. Part of the composite steel belt 100 on the oil scraper 200 is located in the containing space. Part of the composite steel belt 100 on the oil scraper 200 extends out of the containing space. The composite steel belt 100 on the oil scraper 200 extending out of the containing space is used to contact the water body.

[0112] When in use, the hull 310 can be used to allow the oil scraper 200 to work on the water surface. Since the density of oil is less than that of water, the oil floats on the water surface. The oil-absorbing felt 110 in the composite steel belt 100 is used to efficiently absorb the oil on the water surface without absorbing water, thereby improving the efficiency of treating oil in sewage.

[0113] See also Figure 4 as well as Figure 5In this embodiment, the hull 310 includes a cabin 312 and floating members 311 arranged on both sides of the cabin 312. The floating members 311 are used to provide buoyancy for the entire device so that the entire device can float on the water surface. The accommodating space is arranged in the cabin 312. A through hole is arranged at the bottom of the cabin 312. A portion of the composite steel belt 100 is arranged in the cabin 312, and a portion of the composite steel belt 100 passes through the through hole.

[0114] When the cabin 312 floats on the water, the composite steel belt 100 partially extends into the water, and the composite steel belt 100 can be used to absorb the oil on the water surface, thereby achieving the function of oil removal.

[0115] Of course, in other embodiments, the hull 310 may also be configured in other forms, as long as the hull 310 can be used to keep the oil scraper 200 on the water surface for operation, and the composite steel belt 100 can be partially disposed in the water.

[0116] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A composite steel strip, characterized in that: Including steel belt body and oil-absorbing felt: The steel belt body is arranged in a ring shape, the oil-absorbing felt is fixedly attached to the outer surface of the steel belt, and the oil-absorbing felt is used to absorb oil from the oil-water mixture; The oil-absorbing felt is fixedly connected to the steel belt body by glue or rivets; the rivets are arranged at the edge of the steel belt body; The surface of the composite steel belt used for connecting with the oil-absorbing felt is set as a frosted surface; The oil-absorbing felt is prepared by the following method: placing a polyurethane sponge in a roughening liquid and soaking it for 20 to 40 seconds, waiting for the polyurethane sponge to fully absorb the roughening liquid, then taking it out and washing it with water for 3 to 8 minutes, thereby completing the roughening step; Soak the polyurethane sponge in the sensitizing solution for 8 to 12 minutes to complete the sensitization step; Soak the polyurethane sponge in the activation solution for 3 to 7 minutes to complete the activation step; Put the sponge that has completed the sensitization and activation steps into the Fe30 suspension, and heat it at 90-100°C for 20-30 minutes with air; After soaking in 8~12mmol / L lauric acid for 8~12min, soak in 4~6mmol / L hexadecyltrimethoxysilane for 2.5~3.5h, and then dry at 70~90℃ for 10~14h; The roughening liquid is prepared in the following manner: CrO3, HzS0: and water are mixed in a mass ratio of 1-3:3-5:20-30 and stirred evenly; The sensitizing solution is prepared in the following manner: Add excess SnClz to concentrated hydrochloric acid and stir, then filter out the insoluble matter with gauze to leave the clear solution; The activation solution is prepared in the following manner: silver nitrate and water are mixed and stirred at a weight ratio of 10 to 20:1000, and ammonia water is added during the stirring process. When brown precipitates are generated in the solution, ammonia water is continuously added dropwise until the solution becomes clear.

2. An oil scraper, characterized in that , comprising an oil scraper body and the composite steel belt as claimed in claim 1, wherein the oil scraper body is provided with a first roller, the side surface of the first roller is in contact with the oil absorbing felt, and the first roller is used to apply pressure to the oil absorbing felt.

3. The oil scraper according to claim 2, characterized in that The oil scraper body is also provided with an oil scraping plate, one end of which is in contact with the oil absorbing felt to scrape off the oil absorbed on the oil absorbing felt.

4. The oil scraper according to claim 3, characterized in that The oil scraper body also has a second roller, the first roller and the second roller are respectively arranged on both sides of the composite steel belt, and the composite steel belt is clamped between the first roller and the second roller.

5. A de-oiling vessel, characterized in that , comprising a hull and an oil scraper according to any one of claims 2 to 4, wherein the hull has a containing space, the composite steel belt portion of the oil scraper is located in the containing space, the composite steel belt portion of the oil scraper extends out of the containing space, and the composite steel belt of the oil scraper extending out of the containing space is used to contact the water body.

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